AVCOAT

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AVCOAT, which is manufactured directly onto the spacecraft and has an embedded honeycomb-like material, was used for the original Apollo capsules.

Signs of the Times 2009
NASA is considering two ablative materials for the heat shield, AVCOAT and PICA, and testing on the materials is in progress.

Signs of the Times 2009
Currently, the leading candidate material is AVCOAT with PICA as the alternate.

Signs of the Times 2009
"AVCOAT was the material that they used for the Apollo heat shield, so obviously they want to look at that now because it has flown, and it worked," Lang said.

Signs of the Times 2009
Since AVCOAT hasn't been used in nearly 40 years, and PICA has never been used on a manned mission, engineers at Langley and Ames are performing rigorous testing on both candidate materials.

Signs of the Times 2009
Engineers at Langley are using their research capability by conducting a number of tests on PICA and AVCOAT to investigate the thermal and structural behavior of the ablators attached to a honeycomb backing structure.

Signs of the Times 2009
Testing an AVCOAT specimen in an environmental chamber at NASA Langley.

Signs of the Times 2009
Know firsthand there has been difficulty securing original AVCOAT because I received a call / email in October from SRI to release my 1 foot block for tomography and destructive testing.

collectSPACE Today In Space History 2009